tests: hello world playground run with success and failure tests (#2513)

Implement two tests for the rust playground:
- successful run of the hello world example with the hello world message
in stdout and a hidden stderr
- on purpose compilation error is shown in stderr and "No output" in
stdout

.github/workflows/build.yml

@@ -189,6 +189,7 @@ jobs:
         run: npm install
         working-directory: ./tests
       - name: Test Javascript
+        if: matrix.language == 'en'
         run: npm test
         env:
           TEST_BOOK_DIR: ../book/comprehensive-rust-${{ matrix.language }}/html